When a and B meet on the way, a walks 40 kilometers more than B. A walks another 2 hours to B and B walks another 8 hours to A. how about the distance and speed between a and B? no result.

When a and B meet on the way, a walks 40 kilometers more than B. A walks another 2 hours to B and B walks another 8 hours to A. how about the distance and speed between a and B? no result.

T * (V A + v b) = s
V A * T-V b * t = 40
V A * 2 + v b * 8 = s
V A * 2 + 20 = 0.5 * s
The result is
V a = 20 km / h, v b = 10 km / h, s = 120 km, t = 4 h

A and B leave from AB and meet at 40 ㎞ after 5 hours. The speed ratio of a and B is 3:5. What are the speeds of a and B?

Let the speed of car a be 3x and that of car B be 5x
It can be seen from the title
5*（5X-3X）=40
The solution is x = 4
Therefore, the speed of car a is 12, and that of car B is 20